Fourth Stage(RO membrane):It is made of the semi-permeable membrane with the 0.0001 micron filtration precision for separating and removing the bacteria,heavy metal,salt bad mineral substance and other dissolved matter and chemical drug in the running water.

(Mineralized ball or Aluminite):To improve the quality of RO water by the far infrared radiation and releasing essential mineral substance.

(Ultraviolet Sterilizer):It utilizes germicidal ultraviolet light to quickly and reliably disable bacteria,viruses and other micro-organisms present in water.(Magnetizing Filter):The RO water passes through the magnetic field,breaking the original polymer macromolecules so that they become many single active small molecules,the alkaline alkalescent small molecules water is healthful for human body.